Ceramic classifying wheels facilitate high-precision separation in new energy materials and non-metallic minerals

Ceramic classifying wheels are core components of industrial classification equipment made from ceramic materials, primarily used for particle size separation of powders and particles. Compared to traditional metal classifying wheels, they exhibit significant advantages in wear resistance, corrosion resistance, and non-contamination due to their material properties, making them particularly suitable for industrial applications requiring high precision and high purity.

Alumina and zirconia ceramic grading wheels manufactured by Guoci Ceramics

Core Advantages of Ceramic Classifying Wheels

1. Superior Wear Resistance and Long Lifespan: Ceramic materials (such as alumina, zirconia, and ZTA ceramics) generally have a hardness exceeding HRA85, with some reaching HRA90 or higher, far surpassing that of metal materials. This results in extremely low wear rates when processing high-hardness, sharp-particle materials, significantly extending their service life and reducing equipment downtime for maintenance.

2. Complete Isolation from Metal Contamination: As a pure ceramic component, the classifying wheel does not generate metal debris during high-speed operation, fundamentally avoiding metal contamination of the materials. This characteristic is crucial in fields with stringent purity requirements, such as lithium battery cathode materials, pharmaceuticals, food, and electronic materials. 

3. Excellent corrosion resistance and chemical stability: Ceramic materials exhibit strong resistance to corrosive media such as acids and alkalis, maintaining stable performance even in harsh chemical environments and resisting chemical reactions or degradation.

4. Good thermal stability and resistance to deformation: Some advanced ceramics (such as silicon nitride ceramics) possess high thermal conductivity (approximately 30-40 W/m·K) and extremely low coefficient of thermal expansion (approximately 3.2 × 10⁻⁶/°C), enabling rapid dissipation of localized heat generated by high-speed rotation. This effectively prevents softening or deformation due to overheating, ensuring dimensional stability and operational accuracy under high-temperature conditions.

5. Smooth surface, less prone to material adhesion: The high surface smoothness of ceramics prevents material adhesion, facilitating cleaning, reducing the risk of material residue and cross-contamination, and improving production efficiency. 

Main Application Areas of Ceramic Classifying Wheels

Ceramic classifying wheels, with their unique advantages, have been widely used in several industries with high requirements for equipment performance and material quality:

• New Energy Materials: Used for classifying ultrafine powders in the preparation of positive and negative electrode materials for lithium batteries, ensuring uniform particle size distribution while avoiding metal contamination, thus improving battery performance and safety.
• Fine Chemicals and Pharmaceuticals: Used for ultrafine grinding and classification of high-purity chemicals, catalysts, and pharmaceutical raw materials, ensuring product purity and process stability.
• Non-metallic Minerals and New Materials: Suitable for processing high-hardness minerals such as alumina, silicon carbide, and silica, as well as the preparation of nanomaterials and high-performance ceramic powders.
• Metallurgy and Energy: Used for material classification in high-temperature furnaces, combustion systems, and other environments, withstanding extreme temperatures and corrosive atmospheres.
• Food and Environmental Protection: Meets hygiene standards and corrosion resistance requirements in food additive processing, waste gas treatment, and other fields. 

Currently, the mainstream ceramic grader materials include alumina ceramics (lower cost, good wear resistance), zirconia ceramics (higher toughness, superior wear resistance), and silicon nitride ceramics (excellent thermal conductivity, outstanding thermal shock resistance, suitable for extreme high-temperature environments).